Banca de DEFESA: GABRIEL CESAR DOS SANTOS OLIVEIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : GABRIEL CESAR DOS SANTOS OLIVEIRA
DATA : 14/06/2018
HORA: 14:00
LOCAL: UFRN
TÍTULO:

Evidence of delay in the hawksbill turtle nesting season, a study in Northeast of Brazil.

PALAVRAS-CHAVES:

Eretmochelys imbricata; Spawning; Logistic Adjustment; Oviposition frequency distribution; Temporal displacement of maximum posture.

 

PÁGINAS: 54
GRANDE ÁREA: Ciências Biológicas
ÁREA: Biofísica
SUBÁREA: Biofísica de Processos e Sistemas
RESUMO:

In this work, analyzes were carried out to show differences in the spawning period of the hawksbill turtle (Eretmochelys imbricata) observed on the southern coast of the RN. The main goal of this study is to compare spawning peaks throughout the oviposition seasons for a period of ten years of data collection. We analyzed the database (from 2006 to 2016) to evaluate whether there is a temporal shifting of the spawning period of E. imbricata. The spawn records computed daily within each season are visualized as a daily spawn histogram. In order to smooth the data to perform a better statistical analysis was made cumulative sum of data. An adjustment using the logistic curve was performed on the cumulative sum. Based on the spatial variation rate (derived) function calculated by the cumulative sum function and a Gaussian adjustment we estimate, from this point on, the day of maximum spawning occurrence for each season. A significant correlation was observed between occurrence peaks and spawning seasons. By the Pearson test we obtained the statistical data (R = -0.70; df = 8; p = 0.024). The angular coefficient, calculated from the linear adjustment of the data, shows a delay of approximately 1.2 days per year, with error of ± 4,4, throughout the studied period. Given the results shown in the present work, could be correlated with the spawning period (temporal detachment) with probable resource changes and global environmental changes due to climate changes. This work is the result of a partnership between the Post-Graduation in Biological Sciences (PPGCB), School of Science and Technology, UFRN and the TAMAR Project.

MEMBROS DA BANCA:
Presidente - 1753234 - GUSTAVO ZAMPIER DOS SANTOS LIMA
Externo ao Programa - 1696755 - BRUNO LOBAO SOARES
Externo à Instituição - BRUNO DE SOUZA MAGGI - IFRN